CODEWITHSUNDEEP
ruby-on-rails
Simon Cooper
Simon Cooper

Reputation: 1594

Trying to display records from chained models on Rails 5.2

Following on from this question

class CoffeeRoast < ApplicationRecord
    has_many :coffee_blends
    has_many :coffee_beans, through: :coffee_blends
    has_one :country, through: :coffee_beans
end

class CoffeeBean < ApplicationRecord
    has_many :coffee_blends
    has_many :coffee_roasts, through: :coffee_blends
    belongs_to :country
end

class Country < ApplicationRecord
  has_many :coffee_beans
end

class CoffeeBlend < ApplicationRecord
    belongs_to :coffee_bean
    belongs_to :coffee_roast
end

I am able to show the related coffee_beans on the coffee_roasts show page, and also the country, however, I can not work out how to display them correctly.

My current code is attempting to show the bean and its related country on the same row on the table, however the top is blank and the two countries are both in the second row.

coffee_roasts/show.html.erb

<h1 class="display-3"><%= @coffee_roast.name %></h1>
      <p>
        by <h2 class="display-6"><%= @coffee_roast.roaster.roaster_name %></h2>
      </p>

<div class="table-responsive">
 <table class="table">
 <thead>     
    <tr>
      <th>Bean</th>
      <th>Country</th>
    </tr>
    </thead>
    <tbody>
 <% @coffee_roast.coffee_blends.each do |blend| %>
    <tr>
  <th><%= blend.coffee_bean.name %>

    <% end %></th>
  <th><%= @coffee_roast.coffee_beans.map {|cb| cb.country.country_name }.join(', ') %></th>
</tr>   
</tbody>
</table>

Bean | Country

El Martillo |

Finca La Cumbre | El Salvador, Guatemala

El Salvador show be in-line with the El Martillo bean.

My approach feels quite wrong here, but I'm pretty new to working with multiple levels of models so still learning.

How can I get the beans associated country to display alongside the bean?

Upvotes: 0

Views: 22

Answers (2)

Simon Cooper
Simon Cooper

Reputation: 1594

This was actually a lot simpler than I thought. I've found the below works perfectly. No need to map an array.

<tbody>
  <% @coffee_roast.coffee_blends.each do |blend| %>
  <tr>
    <td><%= blend.coffee_bean.name %></td>
    <td><%= blend.coffee_bean.country.country_name %></td> #this bit was the original concern.
    <td><%= blend.coffee_bean.variety %></td>
    <td><%= blend.coffee_bean.process %></td>
  <% end %>
  </tr>   
</tbody>

Upvotes: 1

MorboRe&#39;
MorboRe&#39;

Reputation: 161

<tbody>
  <% @coffee_roast.coffee_blends.each do |blend| %>
    <tr>
      <td><%= blend.coffee_bean.name %></td>
      <td><%= @coffee_roast.coffee_beans.map {|cb| cb.country.country_name }.join(', ') %></td>
    </tr>
  <% end %>  
</tbody>

try and see if this works?

Upvotes: 0

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